Chuck



Patented May l0, 1927.

maar

UNITED STATES PATNToFFIcE.

HARRY E. SLOAN, OF HARTFORE, CONNECTICUT.

CHUCK.

Application filed July 9,

jaws, after having been moved from a certain and defined position, may be replaced in the exact position occupied by them before such movement.

One form of chuck ot this class embodying my invention and in the construction and use of which the objects herein set out, as,

well as others, may be attained is illustrated in the accompanying drawings in which- Figure l is a face view of a portion of a chuck embodying my invention.

Figure 2 is a view in central section on a plane passing through the `xis of the chuck.

Figure 3 is a view in section through a fragment of the chuck ycontaininga chuck jaw.

Figure 4 is a detail view of a fragment of the chuck looking at, the outer surface thereof.

Figure 5 is a perspective view of one of the feed screws illustrating the detent groove therein.

In the use of chucks of the type herein illustrated and described it is often desired to hold pieces of work of irregular shapes, in which the jaws are required to be placed at diterent distances from the axis of the chuck` this in order to grasp the outer surface of the irregular shaped piece. After the jaws have been moved for the purpose mentioned, or for any other purpose, it is of the utmost importance that they should be replaced so that they wiil be all concentric with respect to the axis of the chuck,this in orner that true pieces of work may be accurately centered. vIt is for the purpose of effecting such resultsl that I have invented my improved chuck illustrated and described herein` which chuck, as shown in the drawings, comprises a chuck body 5 having a central opening (3, and a back-plate 7, that is secured to the body in any suitable manner. The device thus far described may be of any well known co-nst-riu-tion common to chucks of this class.

The body is provided with radial grooves 8 in the structure shown) extending from the outer edge of the chuck into the opening G, and the opposite walls of each of these grooves are provided with ribs 9, fitting 1923. Serial N0. 650,332.

grooves in theo sides of chuck jaws 10, in a manner cominon to chucks of this class.

` A pinion or pinions 11 is or are mounted in the body of the chuck, each pinion having means, as an opening in its end, for the reception of a tool by means of which it may be turned. These pinions are beveled pinions, their teeth meshing with teeth on the under side of a scroll ring 12 rotatably mounted in the chuck body and having a thread arranged in the form of a scroll to enthc under surface of a jaw carrier 13 mounted appnrtenant to each of the chuck jaws, rotation of the scroll by the operation ot .the pinions 11 operating to simultaneously move the chuck jaws radially upon the chuck body. Y

incr-dcr that the `jaws may be independently moved for the purpose of accommodating their positions to grasp the surfaces of pieces of work of irregular shapes and whereby the aws are required to be located at different distances from the axis Vof the chuck, feed screws 14C are rotatably mounted in the chuck body, the thread of each screw meshing on one side with a corresponding thread in a jaw carrier 13, and said carrier being operatively connected with the chuck jaw through the interposition of said feed screw.

lith the structure thus far described, after the jaws have been moved, as above set out, so that they are located at different distances from the axis of the chuck and for the purposes specified, it is practically impossible to again accurately place the jaws so that they will each be located at the same distance from the axis of the chuck.

In order that the jaws may be so accurately located after they have been moved from concentric positions, I' provide a groove 15 in the surface of each feed screw Maand extending lengthwise thereof, and I also provide a detent 16 that is located in a recess 17 in the under surface of eachV of the jaws 10, this detent being preferably spring pressed so that it will engage within the groove 15. Preferably this detent is made with a hole extending inwardly from its end in which aspring- 18 is located, as shown in Figure 2 of the drawings.

ln constructing the chuck the parts will be so arranged that when the -detentappurtenant to each jaw is located in its groove l5 in the feed screw la the chuck jaws may all be located in concentric positions, that is,

tiioy nini' nii in@ ioa'ntmi nt tin mino tiisftnnci: ti'oni tito nxis oi" tile cinici;t nini nitnnsi niko tinns provided ifoi' coitniniy ioontini' tito in tinvsn iuoflitionn nini v-:itii iii tio tr'ooiaio. ns n nmins, for nitfiinij; in tinis po tioninig tin;x oilnvii jinwo n .Gwinn oiE `gjmcinntione; iti niny iw vincoli upon tiio info ot tiw` oiinvi: niion'n in* tin vonwonti'ir iinvn in iiiggin'o i. oi tin titnn'ingij to nvt, in vonniotion Yfitii nn intiw; point iti on tito sirio oi` UCil cinit'ii inn' in; Shown in if iginio oi: tin: tiifnwingo, anni in tiiist 'any when tnn'ii inn' in intiepoini- Ontijf inovnci in itin 'tomi zloi'ow i-i. no tinit nii o i? timv intim pointn i'ogijintti' n'itii tiio Sinne nom'npontiingg .iininntionn on tin4x *":n'e ot? tim tfiiinok iioti. tiiojv n'iii :iii im in tin* znno nonitionei with ifnsziwt't: to tin :mis o'li tile Ninn-if, nni by tin-nino; ti o Ft-tti :licitw i-i one wary oi nnoti tii nnt'ii tiw jivttlntt nppnittinnnti :iwi-oto Snaps; into the o 'i'oow-f to mit-i1 inw n'iii bv :wcin'ntoi-v iotfntoti So tino' nii wiii iio nt` tito nznno tiintnnm iront linx :min of tito uit nok.

in omini' to i-Qtnin tinx pinions: il in pinco, i provid@ n pinion Vvtninoi' i'tt'nsn in tile =in1ci ilotiy anni owning;` inwni'tiijiv iioni onoii ot tito iioios in n'iiicii tito piniom` :ii-o iotfntori, nini i inSii't n pinion i'otninoi iii/i in zich ol`l snii'i 170C( Us, vnoit i'ttnintli inwingi' n 1"@- mining` iin LA to @ingaggio n iioniiinr Qlion n `pinion 1L :1nd n? Siiown in if'` no E2. of tim tii'auvingj. A. i'otnining SCI'tW 5 is inntli'tcti iin'ongil :i iioio 2G nijiptn'te inni to onoit pinioin tin` iiootfi of ontfii sst-ww quito f iooiy tittinp; tiio iloit5 init iioingi' nn'iiiciontij7 iooso io pnx'init itin i'entiy i'ot'ntioin tntii oi Suivi #www boing: Scto\\'tin'vntiiffi into tiiio pinion i'otninm' to wcm-e Snvii ifvtninviin tiio position to iioifi tim pinion.

A9 n tnozinn 'tot i'otzttniviy retaining tiio i'ooti strewn 1iin pino@ n'itii inspect: to tiiie tiinc'if jnws i einpioy n tn'opnlt 'temi Soren* Votnnm i?? halting stinpn 2S to oncilcie n iwincoti putt oi? @ooit :food noten', Said ro tninm Qiosoiy fitting i'ccossfsos in the under sitio oi tim` cinici: nn'n nnti ns Shown in Fignrt` i3 o'i" tiio drawings.

in, ncoor'liznmo with tito provisions oii tim patent Stntntcs i ilnvo tionci'iiiod iioi'nin tito principios; oi optintion oi" nn' invention, to Qjttiiiot with tin; iiovico which I now consider to i'tpifonont tiio iiont oiniiotiiniont tiioi'ooif, but. il fiosii'o to inno it nnderntomi timt, tile device :linncn iS oniy iiitnsti'ntivo nini that tiio inwntion inn)Y im mnfiioti ont' iiyot'iloi' moans nini zippiimi to interi otinn' tiinn tiiof-v niiovo mit: ont.

vi cinint-w i. cinici; wompiising n cinnk body, jaws inovniiiv i'zniinii);v .in Snici iioiiy, n 'toed soloii nxonntotfi in iii@ iiotiy, inn oni'i'ioi'n in engngw nient: n'itii finiti 'tomi St'ioii,` n, limiti Soiow ijoi' itniopontientiy moving ozu-i1 otf Suid jnw's, afnt'il .'fzoi'on' iizii'ing :l ionggitntiinniiy t-xxttniiing noti-imi portion in itn iwripinn'y, n Spring in'ofk'tti (iutont cni'rioti inf onoit 'jun' und im'vinn :t imni olE :i nino to im i'ouoivoti in tix@ svi-ow notch \-.innoi n.f it, tony ii@ tiotoinlinoti. winni tin @vili-ni linnn :no vonoonttio with tin wntini :mis oi tim cinici; body.

i tiin ^i Colnpiisiing); n oi'nufic body, jawn inovniiio tntiif iilx' `n sniti iiotiyg n "food f-ioi'oii inmnitt-rti in iii@ inniy, 'jow anti-ions in engage toont; with tito 'limiti soi'oii, o :temi sci'nw `01' intioptniiontiy moving envi! o'l" finiti jaws nini nnnnrl t-n1^iit ti in' timv jinwfs :1mi :noi-own to tivteifmino winni tim` jnwr nro :toinontii'io with 'tito coniini :mis ot3 tin) L'inifri iiotiiy, Finiti moons ooinlnining n noting' pressed oionnnt inwingi' n tnpm'mi iionti oz'ni'ioti by ono-ii inw nntii n not'oii in @noti soton' having inoiinoli Sido 1mii@J to inoeivo tilo oioinent \\fiiotoi y Sniti @lenient nntoninti. :niiy Liifspincod t'i'ont tin?` screw oglooio noon t'otntiion oi tin` sewn'.

HARRY E. ST'MXN,

fili 

